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Magnesium Sulfate

PQ Corporation is one of the world’s leading producers of Epsom salt, or magnesium sulfate heptahydrate crystals.  We offer Epsom salt or magnesium sulfate heptahydrate crystals in USP, Technical, and Agricultural grades.  We also offer magnesium sulfate liquids in a variety of concentrations and include our MagnaBrite® magnesium sulfate solutions which are well known in the pulp & paper industry.  Our USP grade Epsom salt crystals, through a variety of retail distributors, have provided consumers with comfort and relief for decades. Our OMRI-approved Organic Magna Grow® brand agricultural grade magnesium sulfate heptahydrate is a favorite of professional growers who rely on it for the best results in horticultural applications.

PQ Corporation is a member of The Epsom Salt Council.  For more information on the benefits and versatility of Epsom salt, please visit The Epsom Salt Council website at You can also catch up with us on facebook at, twitter at, watch videos on The Epsom Salt Channel on YouTube, or keep up with articles at Delicious

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